TDIGEST.QUANTILE

TDIGEST.QUANTILE key quantile [quantile ...]

Available in:

Redis Stack / Bloom 2.4.0

Time complexity:

O(N) where N is the number of quantiles specified.

Returns, for each input fraction, an estimation of the value (floating point) that is smaller than the given fraction of observations.

Multiple quantiles can be retrieved in a single call.

Required arguments

Return value

Array reply - an array of estimates (floating-point) populated with value_1, value_2, ..., value_N.

• Return an accurate result when quantile is 0 (the value of the smallest observation)
• Return an accurate result when quantile is 1 (the value of the largest observation)

All values are 'nan' if the sketch is empty.

Examples

redis> TDIGEST.CREATE t COMPRESSION 1000
OK
redis> TDIGEST.ADD t 1 2 2 3 3 3 4 4 4 4 5 5 5 5 5
OK
redis> TDIGEST.QUANTILE t 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
 1) "1"
 2) "2"
 3) "3"
 4) "3"
 5) "4"
 6) "4"
 7) "4"
 8) "5"
 9) "5"
10) "5"
11) "5"